Differential pattern time delay shift coding-based bionic underwater sound communication method

Abstract

The invention provides a differential pattern time delay shift coding-based bionic underwater sound communication method. Whistle signals of a dolphin are applied to a differential pattern time delay shift coding communication system, so as to provide the bionic underwater sound communication method. The method comprises the steps: (1) the whistle signals are selected as synchronous codes and pattern codes; (2) a time delay shift value between adjacent whistle signals is used for carrying information; (3) the whistle signals are different from regularly coded signals such as linear frequency modulated signals, the whistle signals truly exist in the marine environment and cannot be detected easily, and the whistle signals are not easy to decode due to special coding method, so the whistle signals have strong communication elusive performance. A system undergoes a pool experiment, the data transmission at a low error rate is realized when the traffic rate is 67 bit / s and the signal-to-noise ratio is 0dB, and the effectiveness, robustness and the elusive performance are verified.

Description

technical field [0001] The invention relates to an underwater acoustic communication method. More precisely, it is a bionic underwater acoustic communication method. Background technique [0002] With the development of modern detection technology, the requirements for concealment of underwater acoustic communication are constantly increasing. Bionics is a method that can be used for concealed underwater acoustic communication. Different from simply reducing the signal-to-noise ratio, bionics uses signals that naturally exist in the underwater acoustic environment as modulation waveforms. Such signals can be sent by marine mammals such as dolphins and whales. sound. According to different forms of signals, dolphin sound signals are generally divided into three categories: echolocation signals (Clicks), communication signals (Whistles) and emergency burst signals (Burst Pulses). In recent years, research on dolphin sonar at home and abroad has mainly focused on echolocatio...

AI Technical Summary

Problems solved by technology

In recent years, research on dolphin sonar at home and abroad has mainly focused on echolocation signals and communication signals. The latter research is mainly divided into two types: one is the classification of communication signals; the other is the analysis of information transmitted by communication signals, and There are few studies on its application in underwater acoustic communication coding

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